Question 82541 in Docker Question posted in
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How to find how a container was started: "docker run" or "docker-compose up"?

When accessing a remote machine I’d like to know if a container was started over docker run or docker-compose or some other means.

Is that even possible?

EDIT: the main reason for this was to find out, where these containers are getting orchestrated, i.e. if the container goes down, will be started again? Where would that configuration be?

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2

Answers


  1. 0

    Unfortunately that’s impossible. You can only guess it according to some secondary properties doing docker inspect container-name.

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  2. 0

    For investigation purposes I created the most simplest docker-compose.yml:

    version: "2.4"
services:
  hello:
    image: "hello-world"

    Then run it with docker-compose up

    And lastly the normal way: docker run -it --name cli hello-world

    So I had two stopped containers:

    $ docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES
6a8d53ff45a4        hello-world         "/hello"            9 minutes ago       Exited (0) 9 minutes ago                       cli
d54f7a2ae8b2        hello-world         "/hello"            9 minutes ago       Exited (0) 9 minutes ago                       compose_hello_1

    Then I compared inspect output of both:

    diff <(docker inspect cli) <(docker inspect compose_hello_1)

    I found out that there are labels which compose creates:

                 "Labels": {}
---
             "Labels": {
                 "com.docker.compose.config-hash": "251ebf43e00417fde81d3c53b9f3d8cd877e1beec00ebbffbc4a06c4db9c7b00",
                 "com.docker.compose.container-number": "1",
                 "com.docker.compose.oneoff": "False",
                 "com.docker.compose.project": "compose",
                 "com.docker.compose.service": "hello",
                 "com.docker.compose.version": "1.24.1"
             }

    Also compose uses another network:

                 "NetworkMode": "default",
---
             "NetworkMode": "compose_default",

    You should do it on your environment and try to find out differences where you can surely differentiate between both launch ways.

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